The bag is compact when the top part is not fully used, it can get tall when fully extended and there is a zipper on top to secure the top part. The material of the bag is premium and the finishing are in detail and thought very carefully, the bag is water resistance its self but if you want to make it a water proof you do need to use the cover to protect it.in terms of compartment and fitting of every compartment, the bag comes compressed and unassembled, so you do need to get the bag in shape which requires time and it does take time to take its proper shape, as it needs to get deformed. I noticed that the laptop compartment is too large and can push the middle section that holds the upper section stuff from falling to the camera and your gear, so it pushes into the laptop compartment slightly, it does take its shape after time but it is not perfect. The sides of the top compartments have pockets which can be used to store small stuff but is hard to reach as the top foldable section extends outwards and you have to reach all the way in. The bottom camera and gear compartment has the boxed container that has a strap around it to hold all your equipment together works well to store a camera and two lenses. The lenses can be tall and be put vertically, if the lens is small you can use the bottom of the boxed removable soft padding to insert small stuff. You also have easy access from one side of the bag to get your camera or any lenses you have.Overall, the bag is stylish and is focused to be compact and expendable when needed, it can be used for 2 night travel backpack as you can have your gear and some clothing in it without taking too much space. It does have straps to insert on top of an airplane carry case too.